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authorLaurent Pinchart <laurent.pinchart@ideasonboard.com>2018-11-19 19:48:39 +0200
committerLaurent Pinchart <laurent.pinchart@ideasonboard.com>2018-11-20 03:06:41 +0200
commit23ac77dc4a096b92da7668e9ddfce10b22e73506 (patch)
tree8dd92a48cdf61f996e171febaf3e6a1c44192a71 /utils/ipu3/ipu3-unpack.c
parent708d3c9fc07e8b27770e365696d8867599b3ae93 (diff)
utils: ipu3: Add IPU3 raw capture unpack utility
The IPU3 captures Bayer data in a 25-pixels-in-32-bytes packed format, which no standard tool can process. Add a quick implementation of data unpacking to turn raw binary files into 16 bits per pixel unpacked Bayer data. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Diffstat (limited to 'utils/ipu3/ipu3-unpack.c')
-rw-r--r--utils/ipu3/ipu3-unpack.c93
1 files changed, 93 insertions, 0 deletions
diff --git a/utils/ipu3/ipu3-unpack.c b/utils/ipu3/ipu3-unpack.c
new file mode 100644
index 00000000..2dce1038
--- /dev/null
+++ b/utils/ipu3/ipu3-unpack.c
@@ -0,0 +1,93 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * ipu3-unpack - Unpack IPU3 raw Bayer format to 16-bit Bayer
+ *
+ * Copyright 2018 Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+ */
+#define _GNU_SOURCE
+
+#include <errno.h>
+#include <fcntl.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+static void usage(const char *argv0)
+{
+ printf("Usage: %s input-file output-file\n", basename(argv0));
+ printf("Unpack the IPU3 raw Bayer format to 16-bit Bayer\n");
+}
+
+int main(int argc, char *argv[])
+{
+ int in_fd;
+ int out_fd;
+ int ret;
+
+ if (argc != 3) {
+ usage(argv[0]);
+ return 1;
+ }
+
+ in_fd = open(argv[1], O_RDONLY);
+ if (in_fd == -1) {
+ fprintf(stderr, "Failed to open input file '%s': %s\n",
+ argv[1], strerror(errno));
+ return 1;
+ }
+
+ out_fd = open(argv[2], O_WRONLY | O_TRUNC | O_CREAT, 0644);
+ if (out_fd == -1) {
+ fprintf(stderr, "Failed to open output file '%s': %s\n",
+ argv[2], strerror(errno));
+ return 1;
+ }
+
+ while (1) {
+ uint8_t in_data[32];
+ uint8_t out_data[50];
+ unsigned int i;
+
+ ret = read(in_fd, in_data, 32);
+ if (ret == -1) {
+ fprintf(stderr, "Failed to read input data: %s\n",
+ strerror(errno));
+ goto done;
+ }
+
+ if (ret < 32) {
+ if (ret != 0)
+ fprintf(stderr, "%u bytes of stray data at end of input\n",
+ ret);
+ break;
+ }
+
+ for (i = 0; i < 25; ++i) {
+ unsigned int index = (i * 10) / 8;
+ unsigned int lsb_shift = (i * 10) % 8;
+ unsigned int msb_shift = 8 - lsb_shift;
+ uint16_t pixel;
+
+ pixel = ((in_data[index+1] << msb_shift) & 0x3ff)
+ | ((in_data[index+0] >> lsb_shift) & 0x3ff);
+ out_data[i*2+0] = (pixel >> 0) & 0xff;
+ out_data[i*2+1] = (pixel >> 8) & 0xff;
+ }
+
+ ret = write(out_fd, out_data, 50);
+ if (ret < -1) {
+ fprintf(stderr, "Failed to read input data: %s\n",
+ strerror(errno));
+ goto done;
+ }
+ }
+
+done:
+ close(in_fd);
+ close(out_fd);
+
+ return ret ? 1 : 0;
+}